Very clever Hugh
Does the Fuji camera have a plug (usually 3.5 stereo type) for an electronic release?
This is what I am using on my Canon eos600D and it works well. So if you have the plug and the invention becomes a nuisance in some situations (as does the size of my camera sometimes) then I recommend it to you.
http://www.ebay.com.au/itm/281115725...84.m1436.l2649
Meanwhile, well done.
Trev